Ruka(流夏)

Ruka is a Japanese Adult Video (JAV) actress who debuted around late 2017, judging by the available work details. While a comprehensive list of her filmography isn't available, she appears to have been active for at least a short period. Based on the single listed title, her early work leaned towards dramatic storylines and themes involving school settings. The presence of tags like "joshi kousei" (high school girl), "seifuku" (school uniform), and "nakadashi" (ejaculation inside) suggests a focus on scenarios involving younger women and potentially taboo subject matter. Without a more extensive list of her works, it's difficult to definitively analyze any genre evolution or which studios or makers she primarily worked with. It's also impossible to determine if she had any recurring roles in series. Overall, Ruka's profile suggests a JAV actress whose initial appearances were focused on specific niches involving schoolgirl themes and dramatic narratives. More information would be needed to paint a fuller picture of her career.